/*
 *   Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 *   Licensed under the Apache License, Version 2.0 (the "License").
 *   You may not use this file except in compliance with the License.
 *   A copy of the License is located at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *   or in the "license" file accompanying this file. This file is distributed
 *   on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 *   express or implied. See the License for the specific language governing
 *   permissions and limitations under the License.
 */

package com.amazon.opendistroforelasticsearch.sql.utils;

import com.amazon.opendistroforelasticsearch.sql.expression.Expression;
import java.util.List;
import java.util.stream.Collectors;
import lombok.experimental.UtilityClass;

/**
 * Utils for {@link Expression}.
 */
@UtilityClass
public class ExpressionUtils {

  public static String PATH_SEP = ".";

  /**
   * Format the list of {@link Expression}.
   */
  public static String format(List<Expression> expressionList) {
    return expressionList.stream().map(Expression::toString).collect(Collectors.joining(","));
  }
}
